Regulation & law · 25/09/2009

EPA Approves Clean Data for Pennsylvania Nonattainment Areas for 1997 Fine Particulate Matter Standard

The US Environmental Protection Agency (EPA) has determined that four Pennsylvania counties - Johnstown, Lancaster, Reading, and York - have met the 1997 fine particulate matter (PM 2.5) National Ambient Air Quality Standard (NAAQS) requirements, allowing them to avoid further federal action under the Clean Air Act.